In Ancient Rome, a lex, or law, was not considered valid until it had been inscribed on bronze or stone and deposited in the vaults beneath the temple of Saturn. Space there was limited however, as the temple of Saturn also housed Rome's Treasury, and it is generally accepted that the tablets containing the various leges were actually stored all over the city rather than in the temple proper. Sulla, acting as Dictator of Rome, thus built a repository for the collected laws of Rome, and called it the Tabularium.